Ensure your chosen drill bit has a compatible shank size with your drill. The shank is the non-cutting end of the drill bit that fits into the drill’s chuck. Don’t forget about the shank size: Alongside the drill bit size, you should also consider the shank size. Size in Size Designation inches 41/64 inch 0.6406 16.5 mm 0.6496 21/32 inch 0.6563 17 mm 0.6693 43/64 inch 0.6719 11/16 inch 0.6875 17.50 mm 0.For example, high-speed steel (HSS) drill bits are suitable for most general-purpose drilling, while cobalt drill bits are better for drilling into harder materials like stainless steel. Consider the drill bit materials: Different drill bit materials can handle specific tasks better.Remember, it’s always better to choose a slightly smaller drill bit and widen the hole if necessary, rather than selecting a larger drill bit and compromising the project’s integrity. Refer to the drill bit size chart: Locate the drill bit size that matches the hole size you need.Assess the material you’ll be working with, as different materials may require specific drill bit sizes.
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For example, a 1/4-inch drill bit has a diameter of 1/4 inch.
And, still, if you fail to determine the accurate size of the drill bit for your drywall anchor, here is. A 7 drill bit is a specific size used for drilling holes in various materials, and the equivalent size for a 7-inch drill bit is a 0.201' diameter bit, 13/64' is 0. For both the molly and plastic drywall anchor, the suggested drill bit size will be 1/2. The drill bit size refers to the diameter of the bit itself. Choose the size according to the anchors’ type, for instance: If your anchor type is a toggle bolt, choose the drill bit size at 5/16 drill bit. The three tables below provide standard, fractional inch and wire gauge drill bit sizes. Drill bit sizes are typically measured in inches, but they can also be measured in millimeters (mm) or fractional inches. The drill size chart is a table list standard size drill bits in several measurement systems, including fractional, metric, wire gauge number, and letter. ANSI/ASME B94.11M-1993ĭrill Bits, also called Twist drills are available with straight or tapered shanks though the most common drill bits will have straight shanks.Before we dive into the drill bit size chart, it’s crucial to understand how drill bit measurements work. ISO (Metric Size Drills) & Conversion to Inchesįractional and Metric Sizes per. The drill size chart contains twist drill data for up to 1.0 inches in diameter.įor typical mechanical tolerances that are achievable see: Drilling Tolerances Capabilities Chart ANSI Size Drill Bit Chart Fractional sizes are measured in inches, while metric sizes are measured in millimeters. M20 x 1.5 18.5mm M22 x 2.5 19.5mm M22 x 1.5 20.5mm M24 x 3.0 21.0mm M24 x 2.0 22.0mm Metric Tap and Drill Bit Size Table 8531 S. The fractions used are always in their simplest form, i.e. Use this chart to select the best drill bit size for the wire youre using. Most commonly used in the US, but can still be found occasionally in the UK, these imperial measurement drill bits come in 1/64 inch increments. Use this chart to select the best drill bit size for the wire youre using. Sizes smaller than 1 8 inch are occasionally used for compressed air, while sizes larger than 2 inches are uncommon, due to the use of alternative methods of joining that are used with. Fractional drill bits are definedby the ANSI B94.11M-1979 standard. ANSI/ASME B94.11M-1993 below are the standard size drill bits used and readily available in industry. Commonly used sizes are 1/ 8, 1/4, 3/ 8, 1/2, 3/4, 1, 1 1/ 4, 1 1/2, and 2 inch, appearing on pipes and fittings by most U.S. Machinist Drill Bit Size Table | Drill Bit Size Chart | ISO Metric Drill Bit Size TableĪNSI and ISO Twist drill size chart Fractional and Metric Sizes per.